Male threaded filter cages for DIY filters, bio chamber and overflows in koi ponds. The small mesh size will contain fluidised media such as Evolution Aqua K1, K1 Micro, Oase Hel-X, and Eco Pond Chips. They can also be used in static media beds.
Use PVC Straight Connector Threaded Female to Plain Female for joining on to PVC Pressure Pipe or Flexi Connectors for anything else.